Montreal Impact midfielder Justin Mapp, center, is taken down by Houston Dynamo midfielder Corey Ashe, right, as he gets past midfielder Brad Davis during the first half of an MLS soccer match on Friday, Oct. 4, 2013, at BBVA Compass Stadium in Houston. less

Montreal Impact midfielder Justin Mapp, center, is taken down by Houston Dynamo midfielder Corey Ashe, right, as he gets past midfielder Brad Davis during the first half of an MLS soccer match on Friday, Oct. ... more

Houston Dynamo midfielder Ricardo Clark celebrates after scoring a goal during the first half of an MLS soccer match against the Montreal Impact on Friday, Oct. 4, 2013, at BBVA Compass Stadium in Houston.

Houston Dynamo midfielder Ricardo Clark celebrates after scoring a goal during the first half of an MLS soccer match against the Montreal Impact on Friday, Oct. 4, 2013, at BBVA Compass Stadium in Houston.

Montreal Impact midfielder Justin Mapp, left, is taken down by Houston Dynamo midfielder Corey Ashe during the first half of an MLS soccer match on Friday, Oct. 4, 2013, at BBVA Compass Stadium in Houston.

Montreal Impact midfielder Justin Mapp, left, is taken down by Houston Dynamo midfielder Corey Ashe during the first half of an MLS soccer match on Friday, Oct. 4, 2013, at BBVA Compass Stadium in Houston.

Houston Dynamo midfielder Ricardo Clark celebrates after scoring a goal during the first half of an MLS soccer match against the Montreal Impact on Friday, Oct. 4, 2013, at BBVA Compass Stadium in Houston.

Houston Dynamo midfielder Ricardo Clark celebrates after scoring a goal during the first half of an MLS soccer match against the Montreal Impact on Friday, Oct. 4, 2013, at BBVA Compass Stadium in Houston.